Civil Engineering / İnşaat Mühendisliği

Permanent URI for this collectionhttps://hdl.handle.net/11147/13

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Language: search.filters.language.enPublisher: search.filters.publisher.Gazi Üniversitesi

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  • Article
    Citation - WoS: 1
    Citation - Scopus: 1
    Fragility Analysis of Wide-Beam Infill-Joist Block Rc Frames
    (Gazi Üniversitesi, 2022) Dönmez, Cemalettin; Karaarslan, Enes; Erberik, Murat Altuğ
    Purpose: The purpose of the presented study is to develop fragility curves for the wide-beam infill-joist block reinforced concrete structures. Theory and Methods: Nonlinear time history analyses are performed for the set of selected ground motions. The performance levels are identified through pushover analysis and fragility curves are produced for ground motion parameters. Results: Fragility curves obtained for the wide-beam RC frames presents a different characteristic than the curves obtained for the conventional frames. Conclusion: Results show that wide-beam RC frame buildings are seismically more vulnerable than the conventional deep beam RC frame buildings based on structural models with similar properties. The possible reason seems to be low lateral stiffness of wide-beam frames that causes large lateral drift demands and therefore severe damage at the wide-beam column connections.
  • Article
    Citation - WoS: 11
    Citation - Scopus: 12
    Effect of Process Parameters on Surface Quality for Wire Saw Cutting of Alumina Ceramic
    (Gazi Üniversitesi, 2011) Teomete, Egemen
    Silicon wafers are sliced using wire saw in micro electronics and photo voltaic industries. Wire saw process occupies a great portion of silicon wafer production cost which affects the market directly. The process is also used to cut ceramics, concrete and rocks in civil engineering. The high cost of the process motivates researchers to develop models that will relate the process efficiency and quality with process parameters. In this study, an experimental parametric study was conducted to investigate the effect of process parameters on the wire bow angle, distributed wire load and surface roughness in wire saw cutting of alumina ceramic. The material removal and surface damage formation mechanisms are identified. Process design recommendations for increasing efficiency of the process while keeping the surface roughness constant, are presented. The surface roughness increases with increasing feed rate, decreases with wire speed and is independent of wire tension. The material is removed by trans-granular failure of the grains while inter-granular fractures of the grains affect the surface quality.